Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Puchnarewicz, E. M."'
Autor:
Brocksopp, C., Starling, R. L. C., Schady, P., Mason, K. O., Romero-Colmenero, E., Puchnarewicz, E. M.
Publikováno v:
Mon.Not.Roy.Astron.Soc.366:953-968,2006
We present XMM-Newton/EPIC spectra for the Laor et al. sample of Palomar Green quasars. We find that a power-law provides a reasonable fit to the 2-5 keV region of the spectra. Excess soft X-ray emission below 2 keV is present for all objects, with t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510776
Autor:
Ashton, C. E., Page, M. J., Blustin, A. J., Puchnarewicz, E. M., Branduardi-Raymont, G., Mason, K. O., Cordova, F. A., Priedhorsky, W. C.
We present XMM-Newton EPIC observations of warm absorbers in the quasars PG 1114+445 and PG 1309+355, both of which exhibit evidence for absorption by warm material in the line-of-sight. We find the absorption in PG 1114+445 to be in two phases, a `h
Externí odkaz:
http://arxiv.org/abs/astro-ph/0408160
We model the spectral energy distribution of the ultrasoft broad-line AGN RE J2248-511 with Comptonised accretion disc models. These are able to reproduce the steep optical and ultrasoft X-ray slopes, and the derived black hole mass is consistent wit
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403008
Publikováno v:
Mon.Not.Roy.Astron.Soc.349:687,2004
We present XMM-Newton X-ray spectra and optical photometry of four high redshift (z=2.96-3.77) quasars, [HB89] 0438-436, [HB89] 2000-330, [SP89] 1107+487 and RX J122135.6+280613; of these four objects the former two are radio-loud, the latter two rad
Externí odkaz:
http://arxiv.org/abs/astro-ph/0312418
We present a series of monitoring observations of the ultrasoft broad-line AGN RE J2248-511 with XMM-Newton. Previous X-ray observations showed a transition from a very soft state to a harder state five years later. We find that the ultrasoft X-ray e
Externí odkaz:
http://arxiv.org/abs/astro-ph/0302360
Autor:
Mason, K. O., Branduardi-Raymont, G., Ogle, P. M., Page, M. J., Puchnarewicz, E. M., Behar, E., Cordova, F. A., Davis, S., Maraschi, L., McHardy, I. M., O'Brien, P. T., Priedhorsky, W. C., Sasseen, T. P.
Publikováno v:
Astrophys.J. 582 (2003) 95-104
Competing models for broad spectral features in the soft X-ray spectrum of the Seyfert I galaxy Mrk766 are tested against data from a 130 ks XMM-Newton observation. A model including relativistically broadened Ly-alpha emission lines of OVIII, NVII a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0209145
Autor:
King, A. R., Puchnarewicz, E. M.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 336 (2002) 445
Many black-hole sources emit a substantial fraction of their luminosities in blackbody-like spectral components. It is usual to assume that these are produced in regions at least comparable in size to the hole's Schwarzschild radius, so that a measur
Externí odkaz:
http://arxiv.org/abs/astro-ph/0206188
Autor:
Puchnarewicz, E. M., Soria, R.
When Beppo-SAX measured the 0.1--12 keV spectrum of RE J1034+396, observations in the optical, UV and EUV were also taken within a few weeks. This multiwavelength spectrum placed very strong constraints on its unusually hot big blue bump component, w
Externí odkaz:
http://arxiv.org/abs/astro-ph/0202030
Publikováno v:
Mon.Not.Roy.Astron.Soc. 327 (2001) L37
We present XMM-Newton observations of Mrk 359, the first Narrow Line Seyfert 1 galaxy discovered. Even among NLS1s, Mrk 359 is an extreme case with extraordinarily narrow optical emission lines. The XMM-Newton data show that Mrk 359 has a significant
Externí odkaz:
http://arxiv.org/abs/astro-ph/0109346
Autor:
Soria, R., Puchnarewicz, E. M.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 329 (2002) 456
We model the optical to X-ray continuum spectrum of the narrow-line Seyfert 1 galaxy RE J1034+396. We show that the flat optical spectrum is consistent with emission from an irradiated accretion disk. The X-ray emission can be modelled with a disk bl
Externí odkaz:
http://arxiv.org/abs/astro-ph/0108492